261672934 has 4 divisors (see below), whose sum is σ = 392509404. Its totient is φ = 130836466.

The previous prime is 261672919. The next prime is 261672941. The reversal of 261672934 is 439276162.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65418232 + ... + 65418235.

It is an arithmetic number, because the mean of its divisors is an integer number (98127351).

Almost surely, 2^261672934 is an apocalyptic number.

261672934 is a deficient number, since it is larger than the sum of its proper divisors (130836470).

261672934 is a wasteful number, since it uses less digits than its factorization.

261672934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130836469.

The product of its digits is 108864, while the sum is 40.

The square root of 261672934 is about 16176.3077987531. The cubic root of 261672934 is about 639.6164156523.

The spelling of 261672934 in words is "two hundred sixty-one million, six hundred seventy-two thousand, nine hundred thirty-four".